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2021-06-01 | Abstract The main results of VTI’s investigations into low-emission combustors for gas-turbine units (GTU) are presented. In recent years, the combustion of a premixed fuel-air mixture (FAM) in a swirling flow in a limited space has been under development for this purpose to attain more complete combustion, stable fluc... | Development of Low-Emission Combustors for Power-Generating GTUs | 10.1134/S0040601521060100 |
2021-06-01 | In this work, morphology and rheology of the blends of cyclic olefin copolymer (COC) with two types of crystalline polyolefins were investigated through a wide range of compositions. The used polyolefins had various plasticity, elasticity and viscoelastic behavior. Their molecular structures were similar but their mole... | Effects of different molecular architectures in terms of comonomer content and composition distribution on the miscibility of cyclic olefin copolymer/polyolefin (COC/POE and COC/LLDPEB) blends | 10.1007/s13726-021-00914-z |
2021-06-01 | Abstract Oxidative conversion of methane to acetic acid at 150°С and a pressure of 6.5 MPa with the assistance of carbon monoxide on rhodium-modified ZSM-5 zeolites with different SiO 2 /Al 2 O 3 molar ratios was studied. A decrease in SiO 2 /Al 2 O 3 from 300 to 30 leads to a 2.7-fold increase in the acetic acid yield... | Direct Low-Temperature Oxidative Conversion of Methane to Acetic
Acid on Rhodium-Modified Zeolites | 10.1134/S0965544121040058 |
2021-06-01 | In this study, intrinsic Ga 2 O 3 (i - Ga 2 O 3 ) film was deposited at about 80 K using a vapor cooling condensation system. Its bandgap energy was 5.0 eV. Low oxygen vacancy and defects were verified by using photoluminescence and Hall measurements. When a 40-nm-thick i - Ga 2 O 3 film was used as the gate dielectric... | AlGaN/GaN Metal-Oxide-Semiconductor High-Electron Mobility Transistors Using Ga2O3 Gate Dielectric Layer Grown by Vapor Cooling Condensation System | 10.1007/s11664-021-08879-8 |
2021-06-01 | We present here a simple and robust photolithography method to fabricate high-porosity SU-8 negative resist templates using positive Poly(methyl methacrylate) (PMMA) as the porogenic agent. We report on how these nanoporous structures are greatly affected by the volume fraction of each component in the precursor soluti... | Elaboration and characterization of nanoporous SU-8 template using PMMA as porogen | 10.1007/s10934-021-01036-w |
2021-06-01 | Low-density polyethylene (LDPE) containing oxygen scavenger based on sodium ascorbate (SA) nanoparticle (5%, 10%, and 15%) was produced by the extrusion method. The performance of produced films to prevent oxidation of packed peanuts during storage at 40 °C for a month was studied. Results indicated that greater SA rel... | Characterization of Oxygen Scavenger Film Based on Sodium Ascorbate: Extending the Shelf Life of Peanuts | 10.1007/s11947-021-02631-0 |
2021-06-01 | A new theoretical solution is presented to determine the stress distribution in a ten-layer simply-supported circular composite plate subjected to the low-velocity impact. The aim of the current study is the investigation of the dynamic analysis of the composite plate when a cylindrical impactor hits the top layer of t... | Dynamic damage analysis of a ten-layer circular composite plate subjected to low-velocity impact | 10.1007/s43452-021-00238-y |
2021-06-01 | Tribological characteristics of low carbon steel (LCS) have been investigated on as-received coarse grains of 67 μm size and ultrafine-grained (UFG) microstructure of 0.2 μm size, which was prepared by equal-channel angular pressing (ECAP). Two-body abrasion tests have been carried out against silicon carbide abrasive ... | Effect of Grain Refinement on Tribological Study of Low Carbon Steel | 10.1007/s12666-021-02242-5 |
2021-06-01 | Root lengthening is regarded as a strategy for rice to adapt to the low phosphorus level. Namely, by increasing the length and surface area of root, rice has an opportunity to enhance its phosphorus adsorption efficiency under low phosphorus conditions. The relationship between main root lengthening of rice seedlings u... | Mechanism of Low Phosphorus Inducing the Main Root Lengthening of Rice | 10.1007/s00344-020-10161-w |
2021-06-01 | We report results from a one-dimensional, numerical simulation of a capacitively coupled $$He/O_2$$ H e / O 2 admixture plasma, operated at pressure varying from 1.5 to 7.5 Torr and over a range of molecular oxygen admixtures ( $$He+0.1\%O_2$$ H e + 0.1 % O 2 – $$He+10\%O_2$$ H e + 10 % O 2 ). This study is used to inv... | Numerical Investigation of Reactive Species Generation in
$$He/O_2$$
H
e
/
O
2
... | 10.1007/s13369-020-04955-z |
2021-06-01 | Abstract The reactions of lead bromide with 7,7,8,8-tetracyanoquinodimethane and anthracen-9-ylmethanamine hydrobromide in dimethylformamide (DMF) afford the known low-dimensional perovskite {PbBr 2 (DMF)} n ( I ) with an impurity of a new hybrid 1D perovskite {Ca(DMF) 6 [PbBr 3 ] 2 } n ( II ), which is isolated in the... | New Low-Dimensional Perovskites Based on Lead Bromide | 10.1134/S1070328421060026 |
2021-06-01 | We investigated sputtered nanocarbon films with respect to the effect of suppressing surface oxygen on their electrochemical properties. The nanocarbon film consisted of nanocrystallites with mixed sp 2 and sp 3 bonds formed by unbalanced magnetron sputtering. Ultraviolet/ozone (UV/O 3 ) irradiation and electrochemical... | Suppression of Surface Oxygen on Nanocarbon Film Electrodes for Maintaining Electrode Activity | 10.2116/analsci.20P315 |
2021-06-01 | An ultra-energy-efficient interconnect structure based on multilayer graphene nanoribbon (MLGNR) interconnects for deep-nanometer technologies is proposed herein. First, a low-swing interconnect based on MLGNRs and high-performance interface circuits using carbon nanotube field-effect transistors (CNTFETs) is proposed.... | An ultra-energy-efficient crosstalk-immune interconnect architecture based on multilayer graphene nanoribbons for deep-nanometer technologies | 10.1007/s10825-021-01677-9 |
2021-06-01 | In the last decade, the Kepler and CoRoT space-photometry missions have demonstrated the potential of asteroseismology as a novel, versatile and powerful tool to perform exquisite tests of stellar physics, and to enable precise and accurate characterisations of stellar properties, with impact on both exoplanetary and G... | HAYDN | 10.1007/s10686-021-09711-1 |
2021-06-01 | Abstract Corrosion of low-carbon steel corrosion in 2.0 M H 2 SO 4 and 2.0 M H 3 PO 4 containing Fe(III) salts is studied using the mass loss of metal specimens and voltammetric measurements on a rotating disk electrode. It is established that during steel corrosion in mineral acid solutions containing Fe(III) salts, t... | Characteristics of the Mechanism of Corrosion of Low-Carbon Steels in Acid Solutions Containing Fe(III) Salts | 10.1134/S0036024421060029 |
2021-06-01 | This study aimed to evaluate the effect of photobiomodulation (PBM) for prevention of radiodermatitis in an irradiated mouse model and compare the efficacy of PBM using 633- or 830-nm wavelengths. Irradiated mice were randomly distributed into three groups: A (633 nm), B (830 nm), and C (without PBM). On post-irradiati... | Effect of photobiomodulation therapy on radiodermatitis in a mouse model: an experimental animal study | 10.1007/s10103-020-03123-x |
2021-06-01 | Abstract The article is devoted to the study of the hydrodynamics of an ejection jet flow. The basic geometric parameters of a free turbulent jet are described. The authors proposed a cellular model of ejection, which allows one to determine with high accuracy the velocity of the gas and solid phases at any point in th... | Determination of Velocity and Concentration of Particles of a Solid Phase in a Turbulent Gas Jet, Immersed in a Fluidized Bed | 10.1134/S1070363221060323 |
2021-06-01 | Background and aim Epichloë gansuensis increases the tolerance of host plants to abiotic stress. However, little is known about the mechanism by which E. gansuensis improves grass growth under low nitrogen availability stress. Methods Achnatherum inebrians with E. gansuensis (E+) and without E. gansuensis (E-) were tre... | Metabolomics insights into the mechanism by which Epichloë gansuensis endophyte increased Achnatherum inebrians tolerance to low nitrogen stress | 10.1007/s11104-021-04930-z |
2021-06-01 | Glycocalyx (GCX) is a thin layer of negatively charged glycoproteins that covers the vascular endothelial surface and regulates various biological processes. Because of the delicate and fragile properties of this structure, it is difficult to detect GCX morphologically. We established a simple method for a three-dimens... | Three-dimensional electron microscopy for endothelial glycocalyx observation using Alcian blue with silver enhancement | 10.1007/s00795-020-00267-1 |
2021-06-01 | The ultra-low permeability reservoir is regarded as an important energy source for oil and gas resource development and is attracting more and more attention. In this work, the active silica nanofluids were prepared by modified active silica nanoparticles and surfactant BSSB-12. The dispersion stability tests showed th... | Mechanism of active silica nanofluids based on interface-regulated effect during spontaneous imbibition | 10.1007/s12182-020-00537-8 |
2021-06-01 | Phosphorus (P) is an essential macronutrient to all crops including rice and it plays a key role in various plant activities and development. Low availability of P in the soils negatively, influences rice crop growth and causes significant yield loss. In the present study, we characterized a set of 56 germplasm lines f... | Morphological and molecular screening of rice germplasm lines for low soil P tolerance | 10.1007/s13562-020-00586-5 |
2021-06-01 | Objective NLRP3 inflammasome may play a key role in OA pathogenesis. Stromal cell-derived factor-1 (SDF-1) is a homeostatic CXC chemokine. Since the role of SDF-1 in OA has not been explored, this study aimed to examine the effect of SDF-1 on NLRP3 inflammasome and pyroptosis in synoviocytes from OA joints. Materials a... | Exogenous stromal cell-derived factor-1 (SDF-1) suppresses the NLRP3 inflammasome and inhibits pyroptosis in synoviocytes from osteoarthritic joints via activation of the AMPK signaling pathway | 10.1007/s10787-021-00814-x |
2021-06-01 | As the calculation of transformer no-load characteristics measured by low-frequency test method is not perfect, different interpolation methods are explored to fit and convert the transformer's volt-ampere characteristics under power frequency (50 Hz) excitation to find the best interpolation fitting conversion method.... | Comparison of low-frequency non-sinusoidal measurement for transformer no-load characteristics based on different interpolation methods | 10.1007/s00202-020-01199-w |
2021-06-01 | The effect of glutarimide dioxime (H 3 A) on the fate of Tc in aqueous solution was studied, the results found that the distribution ratio of Tc between TBP and aqueous phase decreased by one order of magnitude with addition of H 3 A, due to the formation of low-valent Tc complexes with H 3 A. Further study of coordina... | The coordination of low-valent Re/Tc with glutarimide dioxime and the fate of Tc in aqueous solution: spectroscopy, ESI–MS and EXAFS | 10.1007/s10967-021-07738-4 |
2021-06-01 | The current T-stub specimen of welded beam-to-column connections in steel structures was improved by adding clamping ends at both sides for convenience of fatigue tests. Uniaxial fatigue tests of the T-stub specimens were conducted. The fatigue properties and failure characteristics of the T-stub specimens were summari... | Fatigue Test Research on Improved T-Stub Specimen of Welded Beam-to-Column Connections | 10.1007/s11668-021-01118-6 |
2021-06-01 | Sustainable urban drainage systems are multi-functional nature-based solutions that can facilitate flood management in urban catchments while improving stormwater runoff quality. Traditionally, the evaluation of the performance of sustainable drainage infrastructure has been limited to a narrow set of design objectives... | Many-Objective Optimization of Sustainable Drainage Systems in Urban Areas with Different Surface Slopes | 10.1007/s11269-021-02840-4 |
2021-06-01 | Abstract The SiCOH low- k dielectric film was grown on Si substrate using plasma-enhanced chemical vapor deposition method. Atomic structure and optical properties of the film were studied with the use of X‑ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR) absorption spectroscopy, Raman spectrosco... | Atomic Structure and Optical Properties of Plasma Enhanced Chemical Vapor Deposited SiCOH Low-k Dielectric Film | 10.1134/S0030400X21050088 |
2021-06-01 | The age of the Silurian Lower Red Beds in the Upper Yangtze region remains debatable. Twenty-four samples were collected for conodont biostratigraphical studies from the Paiyunan Formation in the Sanbaiti Section, Huaying, Sichuan Province. The conodont fauna from the Paiyunan Formation, together with the graptolites f... | Age of the Silurian Lower Red Beds in South China: Stratigraphical Evidence from the Sanbaiti Section | 10.1007/s12583-020-1350-6 |
2021-06-01 | Purpose 5-iododeoxyuridine (IUdR), a radiosensitizer able to be incorporated into nascent DNA during synthesis, makes the DNA easy to break upon irradiation. IUdR has been used together with low energy radiation in cancer treatments mechanistically by Auger electron induction to damage DNA. In this study, a small-sized... | Enhancement of IUdR Radiosensitization in Cancer Therapy by Low-Energy Transmission X Ray Irradiation | 10.1007/s40846-021-00616-0 |
2021-06-01 | Purpose Based on findings of the Asian low-concentration atropine for myopia progression study, a concentration of 0.05% has been proposed as a good compromise between safety and efficacy for myopia control. However, no data on side effects have been published so far in Caucasian children receiving this dose. Methods P... | Side effects of topical atropine 0.05% compared to 0.01% for myopia control in German school children: a pilot study | 10.1007/s10792-021-01755-8 |
2021-06-01 | Environmental degradation has severely affected the natural cycle of ecosystem. It’s high time now and humans should execute strategies effectively to protect the further degradation. Initially, we need to understand the ways that might affect the environment. Thus, existing research is designed to explore the nonlinea... | Financial development, international trade, and environmental degradation: a nonlinear threshold model based on panel smooth transition regression | 10.1007/s11356-020-11912-8 |
2021-06-01 | Identification of “donors” possessing superior traits to adapt to low phosphorus (P) soils is a primary requirement to develop efficient crop plants for sustainable agricultural production. Diverse wheat ( Triticum aestivum L., 89) and triticale (× Triticosecale Wittmack, 15) genotypes were phenotyped in soil with low ... | Evaluation of Diverse Wheat (Triticum aestivum) and Triticale (× Triticosecale) Genotypes for Low Phosphorus Stress Tolerance in Soil and Hydroponic Conditions | 10.1007/s42729-021-00436-w |
2021-06-01 | Purpose of the Review Surgical site infections (SSI) affect millions of individuals around the world, leading to a significant burden on perioperative morbidity and healthcare economy. Over the past decade low-income and middle-income countries (LMICs) have made substantial advancements on infection prevention strategi... | Sterility and Infection Prevention Standards for Anesthesiologists in LMICs: Preventing Infections and Antimicrobial Resistance | 10.1007/s40140-021-00441-w |
2021-06-01 | Trigeminal neuralgia is a recurrent episode of facial pain, that may be associated with other conditions such as multiple sclerosis, neoplasms, and nerve compromises or may occur due to an unknown cause. The available treatments are pharmacotherapy or surgery; however, both are susceptible to develop side effects. Phot... | Photobiomodulation on trigeminal neuralgia: systematic review | 10.1007/s10103-020-03198-6 |
2021-06-01 | Purpose of the Review Chronic low back pain (CLBP) is a major contributor to societal disease burden and years lived with disability. Nonspecific low back pain (LBP) is attributed to physical and psychosocial factors, including lifestyle factors, obesity, and depression. Mechanical low back pain occurs related to repea... | A Comprehensive Review of Over the Counter Treatment for Chronic Low Back Pain | 10.1007/s40122-020-00209-w |
2021-06-01 | The prevalence of low back pain associated with disc degeneration reduced quality of life with socio-economic impact. This study is aimed at investigating the histomorphometric and antioxidant response of Brassica oleracea extract in annular puncture-induced intervertebral disc degeneration using a rabbit model. Fiftee... | Histomorphometric and collagen fibers organization in annular punctured induced intervertebral disc degeneration in rabbit model: restorative and antioxidant role of Brassica oleracea | 10.1007/s13596-021-00560-z |
2021-06-01 | Background Low back pain (LBP) has been found to profoundly increase in athletes in the last decade. There are numerous treatment options available for LBP of which retrowalking seems to be a promising option for these patients; however, its potential utility in athletes is not known yet. Aim To investigate the effect ... | Impact of retrowalking on pain, range of motion, muscle fatigability, and balance in collegiate athletes with chronic mechanical low back pain | 10.1007/s11332-020-00682-y |
2021-06-01 | An evident underestimation of the targeted prevention of dental diseases is strongly supported by alarming epidemiologic statistics globally. For example, epidemiologists demonstrated 100% prevalence of dental caries in the Russian population followed by clinical manifestation of periodontal diseases. Inadequately prov... | Making a complex dental care tailored to the person: population health in focus of predictive, preventive and personalised (3P) medical approach | 10.1007/s13167-021-00240-7 |
2021-06-01 | Purpose of Review The COVID-19 pandemic has posed an unprecedented challenge to healthcare, particularly in resource-constrained low and middle-income countries (LMICs). We aim to summarize the challenges faced by LMICs in providing breast cancer care during the pandemic and their response during this crisis. Recent Fi... | The Novel Coronavirus (COVID-19) Pandemic and the Response in Low-to-Middle Income Countries | 10.1007/s12609-021-00409-z |
2021-05-29 | Low temperatures are important for the production of spring maize in northern China. While the low-temperature tolerance of maize seeds can be improved by coating them, this can result in environmental pollution, high costs, and instability. Therefore, identifying new varieties of maize is the most effective method of ... | Combining ability and genetic diversity under low-temperature conditions at germination stage of maize (Zea mays L.) | 10.1007/s10681-021-02865-1 |
2021-05-29 | A series of solution-processable and photosensitive polyimide (PSPI) coatings with enhanced high-temperature dimensional stability were designed, synthesized and characterized. For this purpose, the rigid-rod benzanilide (Ph − CONH − Ph) units with methyl substituents were incorporated into the molecular structures of ... | Preimidized auto-photosensitive polyimides containing methyl-substituted benzanilide units with increased high-temperature dimensional stability for advanced optical applications: preparation and properties | 10.1007/s10965-021-02591-1 |
2021-05-29 | Abstract The purpose of this study was to enhance the biosorption capacity of the aquatic biomass Callitriche obtusangula for the anionic dye Direct Red 89 in aqueous solution through chemical pretreatment. Batch experiments were carried out to determine the optimal pretreatment parameters of the biomass, such as the n... | Study of the chemical pretreatment of a nonconventional low-cost biosorbent (Callitriche obtusangula) for removing an anionic dye from aqueous solution | 10.1007/s41207-021-00265-4 |
2021-05-26 | Convolution neural network is applied in image processing, and it can also carry out deep learning according to image classification. Its main advantage is that it can directly convolute the pixels related to the image, and then extract the main image features from the image. Of course, this way of processing may be cl... | RETRACTED ARTICLE:Simulation of rainfall process in mountainous regions and sports athletes’ fatigue recovery based on convolutional neural network | 10.1007/s12517-021-07364-0 |
2021-05-20 | Enzymes are the complex protein moieties, catalyze the rate of chemical reactions by transforming various substrates to specific products and play an integral part in multiple biochemical cycles. Advancement in enzyme research and its integration with industries have reformed the biotech industries. It provides a super... | Cost-effective production of biocatalysts using inexpensive plant biomass: a review | 10.1007/s13205-021-02847-z |
2021-05-20 | Background Circulating tumor DNA (ctDNA) offers minimally invasive means to repeatedly interrogate tumor genomes, providing opportunities to monitor clonal dynamics induced by metastasis and therapeutic selective pressures. In metastatic cancers, ctDNA profiling allows for simultaneous analysis of both local and distan... | Modeling clonal structure over narrow time frames via circulating tumor DNA in metastatic breast cancer | 10.1186/s13073-021-00895-x |
2021-05-17 | A new series of thermo-pH responsive polymers based on N-isopropylacrylamide and new cationic monomer has been synthesized from p -cresol in two facile steps and named by 2-((diethylamino)methyl)-4-methylphenyl acrylate), and abbreviated by (DEAMPA). It has been investigated by 1 H NMR, 13 C NMR, and FT IR. Three copol... | Poly(N-isopropylacrylamide-co-2-((diethylamino)methyl)-4-methylphenyl acrylate) thermo-ph responsive copolymer: trend in the lower critical solution temperature optimization of Poly (N-isopropyylacrylamide) | 10.1007/s10965-021-02574-2 |
2021-05-17 | Avalanche photodiodes (APDs) are well-suited for single-photon detection on quantum communication satellites as they are a mature technology with high detection efficiency without requiring cryogenic cooling. They are, however, prone to significantly increased thermal noise caused by in-orbit radiation damage. Previous... | Repeated radiation damage and thermal annealing of avalanche photodiodes | 10.1140/epjqt/s40507-021-00103-0 |
2021-05-17 | Background It’s necessary to analyze the related risk factors and complications of low cardiac output syndrome (LCOS) after operation in children with congenital heart disease (CHD), to elucidate the management strategy of LCOS. Methods CHD children admitted to the department of cardiology in our hospital from January ... | Analysis of risk factors of low cardiac output syndrome after congenital heart disease operation: what can we do | 10.1186/s13019-021-01518-7 |
2021-05-13 | Metamorphic pressure–temperature conditions and sedimentary provenance were determined for the middle Permian Fanjiatun Formation in east Changchun, China, based on clay mineralogy, vitrinite reflectance and geochemical data. The pelitic rocks in the Fanjiatun Formation contain illite + kaolinite + chlorite ± mixed-lay... | Clay mineralogy and geochemistry of pelitic rocks in the middle Permian Fanjiatun formation, East Changchun, China: implications for metamorphism and provenance | 10.1007/s12517-021-07259-0 |
2021-05-13 | Background The job one does for a living may increase ones propensity to cardiovascular diseases due to many associated risk factors. University staff may be at high risk of dyslipidaemia, a major cardiovascular disease risk factor. This study assessed prevalence of dyslipidaemia and its associated factors among the st... | Prevalence and associated factors of dyslipidaemia among university workers in Southeast Nigeria: a cross-sectional study | 10.1186/s13690-021-00600-9 |
2021-05-10 | Background Antimicrobial resistance (AMR) is a global public health threat and is increasingly prevalent among enteric pathogens in low- and middle-income countries (LMICs). However, the burden of multidrug-resistant organisms (MDROs) in older children, adults, and elderly patients with acute diarrhea in LMICs is poorl... | Multidrug-resistant enteric pathogens in older children and adults with diarrhea in Bangladesh: epidemiology and risk factors | 10.1186/s41182-021-00327-x |
2021-05-10 | Background Biopsychosocial factors above and beyond pathoanatomical changes likely contribute to the severity of chronic low back pain. A pro-nociceptive endogenous pain modulatory balance (↓inhibition and ↑facilitation) may be an important contributor to chronic low back pain severity and physical function; however, a... | Temporal summation of mechanical pain prospectively predicts movement-evoked pain severity in adults with chronic low back pain | 10.1186/s12891-021-04306-5 |
2021-05-10 | It will be shown analytically that the light sector of the identity block of a mixed heavy-light correlator in the large central charge limit is given by a correlation function of light operators on an effective background geometry. This geometry is generated by the presence of the heavy operators. It is shown that thi... | The large-c Virasoro identity block is a semi-classical Liouville correlator | 10.1007/JHEP05(2021)067 |
2021-05-06 | Fracture evaluation is very important in the carbonate reservoirs, particularly fractured reservoir, due to the high impact of fractures on the reservoir permeability. Assessment of fracture parameters of reservoirs is necessary to optimize oil production. Image logs are regarded the best methods for this aim. This stu... | Analysis of fractures in the Dalan and Kangan carbonate reservoirs using FMI logs: Sefid-Zakhur gas field in the Fars Province, Iran | 10.1007/s13146-021-00686-w |
2021-05-04 | Bituminous sub-ballast is considered as an appropriate solution for increasing the structural performance and durability of railway sub-structure. This is especially prominent due to the continuous development of trains, which are capable of circulating at ever faster speeds and transporting evermore freight. Thus, the... | High performance bituminous sub-ballast for improving the structural behaviour and durability of railway track substructure | 10.1617/s11527-021-01677-y |
2021-05-04 | Background Inflammatory microenvironment is significant to the differentiation and function of mesenchymal stem cells (MSCs). It evidentially influences the osteoblastogenesis of MSCs. IL-34, a newly discovered cytokine, playing a key role in metabolism. However, the research on its functional role in the osteogenesis ... | Low-dose IL-34 has no effect on osteoclastogenesis but promotes osteogenesis of hBMSCs partly via activation of the PI3K/AKT and ERK signaling pathways | 10.1186/s13287-021-02263-3 |
2021-05-02 | The dynamics of particle processes can be described by population balance equations which are governed by phenomena including growth, nucleation, breakage and aggregation. Estimating the kinetics of the aggregation phenomena from measured density data constitutes an ill-conditioned inverse problem. In this work, we foc... | Reconstruction of low-rank aggregation kernels in univariate population balance equations | 10.1007/s10444-021-09871-w |
2021-05-01 | The persistence of many micropollutants in water and wastewater is of great concern to the contemporary scientific community. Several types of advanced techniques such as heterogeneous photocatalysis are being used for the degradation of micropollutants in waters from domestic, industrial, and agricultural activities. ... | Structured photocatalytic systems: photocatalytic coatings on low-cost structures for treatment of water contaminated with micropollutants—a short review | 10.1007/s11356-020-10022-9 |
2021-05-01 | Abstract The stress-strain state of metal-polymeric friction pairs for vehicle brakes under low-cycle fatigue is examined from the standpoint of mesomechanics. The concepts of metal fatigue are developed in the scope of physical mesomechanics associated with studies on the damage accumulation, primarily in the field of... | Mesomechanics of Metal-Polymeric Pairs in Friction Units under Low-Cycle Fatigue | 10.3103/S1068366621030053 |
2021-05-01 | In the next generation wireless communication systems operating at near terahertz frequencies, dielectric substrates with the lowest possible permittivity and loss factor are becoming essential. In this work, highly porous (98.9% ± 0.1%) and lightweight silica foams (0.025 ± 0.005 g/cm 3 ), that have extremely low rela... | Lightweight porous silica foams with extreme-low dielectric permittivity and loss for future 6G wireless communication technologies | 10.1007/s12274-020-3201-2 |
2021-05-01 | Abstract The strength and low-temperature stability of 09Mn2Si steel are investigated. The mechanical properties of samples obtained by 3D printing (electric arc surfacing) in CNC machine tools are close to those of samples obtained from rolled sheet. In fact, the strength and yield point after 3D printing are superior... | Low-Temperature Stability of Manganese Steel Parts Obtained by 3D Printing from Welding Wire | 10.3103/S1068798X21050051 |
2021-05-01 | Dynamic mechanical properties of thermal aging hydroxyl-terminated polybutadiene (HTPB)-based propellant were tested using split Hopkinson pressure bar (SHPB) under low temperature (− 50 to 25 °C) and high strain rate (800–2000s −1 ). Relevant test data were obtained. Moreover, microscopic damages of thermal aging HTPB... | Low-temperature dynamic mechanical properties of thermal aging of hydroxyl-terminated polybutadiene-based propellant | 10.1007/s13726-021-00902-3 |
2021-05-01 | Key message This paper demonstrates that BBX28 and BBX29 proteins in Arabidopsis promote flowering in association with the CO-FT regulatory module at low ambient temperature under LD conditions. Abstract Flowering plants integrate internal developmental signals with external environmental stimuli for precise flowering ... | Two B-box domain proteins, BBX28 and BBX29, regulate flowering time at low ambient temperature in Arabidopsis | 10.1007/s11103-021-01123-1 |
2021-05-01 | Various studies and arrangements have been made in recent years to reduce the effect of refrigerants used in cooling and heating systems on climate change. Environmentally friendly refrigerants with low global warming potential are required to reduce the negative impact of air-conditioning systems on climate change. HF... | Investigation of using R134a, R1234yf and R513A as refrigerant in a heat pump | 10.1007/s13762-020-02857-z |
2021-05-01 | The stability of betalains (Bet) encapsulated in cryogels made with a mixture of albumin (ALB) and albumin-pectin (ALB-PEC) as wall materials were evaluated during storage at 32% and 83% relative humidity (RH) at several different temperature conditions (4 °C, 30 °C and 40 °C). The retention of betalains (betanin + iso... | Effect of temperature and relative humidity on the stability of betalains encapsulated in cryogels from protein and polysaccharide | 10.1007/s13197-020-04713-x |
2021-05-01 | Abstract The effects of the low-temperature plasma exposure, gg irradiation, and combined γ irradiation and plasma exposure on the structure and surface properties of thin films based on polylactic acid (PLA) are studied. Films are prepared by the solvent casting method. It is shown that films based on polylactic acid ... | Effect of Low-Temperature Plasma Treatment and γ Irradiation on the Surface Properties of Thin Films Based on Polylactic Acid | 10.1134/S207511332103014X |
2021-05-01 | Here we present a novel approach of intercritical heat treatment for microstructure tailoring, in which intercritical annealing is introduced between conventional quenching and tempering. This induced a heterogeneous microstructure consisting of soft intercritical ferrite and hard tempered martensite, resulting in a lo... | Determining role of heterogeneous microstructure in lowering yield ratio and enhancing impact toughness in high-strength low-alloy steel | 10.1007/s12613-020-2235-5 |
2021-05-01 | Abstract The channel pipes of the control and safety systems of RBMK-1000 reactors are made of a Zr–2.5% Nb (E125) alloy and must operate for 45 years. The evolution of the alloy structure under the action of long-term low-temperature neutron irradiation is studied. The grain structure of the alloy is shown to be stabl... | Structural Evolution of a Zr–2.5% Nb Alloy during Long-Term Low-Temperature Neutron Irradiation | 10.1134/S0036029521050025 |
2021-05-01 | Abstract— A mechanism is suggested to explain the transport of sulfide material by means of its dissolution and subsequent redeposition under the effect of an ascending infiltrating flow of intercumulus melt during the compaction of cumulates in layered plutons. Evidences of this process are observable in the Burakovo–... | Infiltration of Intercumulus Liquid as a Process for the Sulfide Relocation—An Example from Low-Sulfide Mineralization of the Burakovo–Aganozero Intrusion | 10.1134/S0016702921050050 |
2021-05-01 | In order to explore the effect of a small amount of rare earth addition in ultra-cleaned pipeline steel and the influence of the cooling process on the tensile and impact properties, three API X80 pipeline steels were fabricated by varying RE addition and the cooling process at the same time. Three microstructures with... | Effect of Rare Earth and Cooling Process on Microstructure and Mechanical Properties of an Ultra-Cleaned X80 Pipeline Steel | 10.1007/s40195-020-01151-8 |
2021-05-01 | Abstract Mixtures of low-density polyethylene ( T m = 108°C, enthalpy of melting 80 J g –1 ) with 90 wt % indigo, lophine, bromcresol purple, spiropyran, phenol red, rhodamine, phenolphthalein, and fluorescein were subjected to plastic deformation under a pressure of 1 GPa on an anvils-type high-pressure apparatus. The... | Exothermic Effects in Mixtures of Low-Density Polyethylene with 90 wt % of Low-Molecular-Weight Organic Compounds after Plastic Deformation under High Pressure | 10.1134/S2070205121030266 |
2021-05-01 | The current stage of development of promising gas and gas-condensate fields on the territory of Russia is realized at the extracting plants whose products contain carbon dioxide (CO 2 ). The presence of carbon dioxide, in combination with moisture and other factors, stimulates the intense development of corrosion proce... | Corrosion Activity of Operating Conditions for the Steel Equipment and Pipelines in the Plants Extracting CO2-Containing Gases | 10.1007/s11015-021-01132-x |
2021-05-01 | This study combines the thermodynamic analysis of a polygeneration system along with the numerical modelling of the thermal behavior of geothermal reservoirs in Mexico to exploit their energy. Each reservoir was modeled as a porous medium assuming a five-spot well configuration and local thermal equilibrium. The heat c... | Polygeneration Study of Low-to-Medium Enthalpy Geothermal Reservoirs in Mexico | 10.1007/s11630-020-1271-9 |
2021-05-01 | Abstract The effect of salicylic acid (SA) on the reaction of cucumber plants ( Cucumis sativus L.) on the effect of low positive temperatures has been studied. It was found that treatment with SA promotes a decrease in the release of electrolytes from the tissues of cotyledonous leaves of seedlings exposed to subdamag... | Effect of Salicylic Acid on Antioxidant Enzymes and Cold Tolerance of Cucumber Plants | 10.1134/S1021443721020059 |
2021-05-01 | The hydrogen effect on strength, ductility, low-cycle life, and cyclic crack resistance parameters of steels of different structural classes and a heat-resistant nickel alloy is studied in the range of load rates of 0.01–100 mm/min, amplitudes and frequencies of low-cycle bending of 0.8–1.6% and 8.3·10 –3 – 8.3·10 –1 ,... | Load Rate-Related Mechanical Properties of Steels and Alloys under Static and Cyclic Loading in Gaseous Hydrogen | 10.1007/s11223-021-00303-0 |
2021-05-01 | Basalt fibre-reinforced plastic sheet (BFRP) enhancement is one of the strengthening methods suitable for concrete structures due to the low price and high tensile strength of BFRPs. It is of great importance to study the mechanical performance of BFRP-reinforced low-strength concrete structures in freeze–thaw environm... | Experimental and Theoretical Research on Low-Strength Concrete Beams Reinforced with Basalt Fibre-Reinforced Plastic Sheets in a Freeze–Thaw Environment | 10.1007/s13369-020-05249-0 |
2021-05-01 | Abstract Mixtures of low-density polyethylene ( T m = 108°C; enthalpy of melting, 80 J g −1 ) with various low-molecular-weight organic components have been subjected to plastic deformation under a pressure of 1 GPa on an anvil-type high-pressure device. Melamine, cyanuric acid, adamantane, tetracene, fumaric acid, suc... | Influence of Low-Molecular-Weight Organic Compounds on Thermal Effects in Their Mixtures with Low-Density Polyethylene after High-Pressure Plastic Deformation | 10.1134/S0018143921020120 |
2021-05-01 | A concept is developed for assessing the stability of untransformed austenite entering the martensite-austenite component of a bainitic structure, which is determined by the action of hydrostatic stresses caused by difference in the specific volumes of the austenite and ferrite phases. Relations describing the thermal ... | Stability of Untransformed Austenite in M/A Phase of Bainitic Structure of Low-Carbon Steel | 10.1007/s11041-021-00648-y |
2021-05-01 | Abstract This paper describes the preparation, broad characterization and study of activity in hydrogenation and hydroformylation reactions of an easily produced 0.18% Rh/Al 2 O 3 . Analytical studies on fresh and recycled samples shed light on the smart properties of such catalyst. Results showed high activity as well... | A Low Rhodium Content Smart Catalyst for Hydrogenation and Hydroformylation Reactions | 10.1007/s10562-020-03407-5 |
2021-05-01 | Physical modeling of microalloyed low-carbon steel cooling in a dilatometer under intense cooling conditions is studied. A comparative study of the potential of intense cooling during which the metal cooling rate achieved exceeds by several factors the potential of standard laminar units is provided. Potential versions... | Effect of Hot-Rolled Strip Intense Post-Deformation Cooling Parameters on Structure Formation Processes in Low-Carbon Steels | 10.1007/s11015-021-01130-z |
2021-05-01 | In this article, the influence of simulated thermal cycles for the heat-affected zone (HAZ) on the microstructural evolution and mechanical properties in a low-carbon high-strength Cu-bearing steel was investigated by microstructural characterization and mechanical tests. The results showed that the microstructure of t... | On the Microstructural Strengthening and Toughening of Heat-Affected Zone in a Low-Carbon High-Strength Cu-Bearing Steel | 10.1007/s40195-020-01159-0 |
2021-05-01 | An attempt was made to increase the solubility of High Level liquid Waste (HLW), mainly Cr and Mo, by addition of P 2 O 5 to sodium borosilicate glass. A total of seven different phosphorus containing alkali borosilicate glass samples were in-house fabricated. As a part of chemical quality control, concentrations of fo... | Simultaneous quantification of low Z elements in phosphorus containing alkali borosilicate glass samples by in situ Current normalized external (in air) PIGE method utilizing proton beam from FOTIA | 10.1007/s10967-021-07679-y |
2021-05-01 | Potassium-ion batteries (KIBs) are promising candidates for large-scale energy storage due to the abundance of potassium and its chemical similarity to lithium. Nevertheless, the performances of KIBs are still unsatisfactory for practical applications, mainly hindered by the lack of suitable cathode materials. Herein, ... | A novel low-cost and environment-friendly cathode with large channels and high structure stability for potassium-ion storage | 10.1007/s40843-020-1512-0 |
2021-05-01 | Abstract n- Propyl bromide has substantial industrial importance, mainly in the field of agrochemicals and pharmaceuticals. The present work provides an improved, efficient, cost effective and industrially scalable preparation of n- propyl bromide starting from n- propanol, liquid bromine and sulfur with yields up to 9... | An Improved Process for Industrial Production of n-Propyl Bromide | 10.1134/S1070427221050189 |
2021-05-01 | Bacteria growth depends crucially on protein synthesis, which is limited by ribosome synthesis. Ribosomal RNA (rRNA) transcription is the rate-limiting step of ribosome synthesis. It is generally proposed that the transcriptional initiation rate of rRNA operon is the primary factor that controls the rRNA synthesis. In ... | Control of ribosome synthesis in bacteria: the important role of rRNA chain elongation rate | 10.1007/s11427-020-1742-4 |
2021-05-01 | A fundamental difference between the grain size composition of cement-free refractory concretes (CFRC) from low- and ultra-low-cement concretes is presence within their composition of up to 2 – 3 % nanoparticles (<0.1 μm) that determine increased reactivity. During selection of the optimum CFRC grain size composition i... | Cement-Free Refractory Concretes. Part 7. Concrete Mix Properties and their Grain Size Distribution | 10.1007/s11148-021-00556-x |
2021-05-01 | Abstract Loy Yang lignite was pyrolyzed under nitrogen atmosphere in a tube furnace. The changes in physicochemical properties during low-temperature pyrolysis process and their effects on water re-adsorption capacity were investigated. All the samples were characterized by X-ray photoelectron spectroscopy, zeta potent... | Effects of Low-Temperature Pyrolysis in a Tube Furnace on Water Re-adsorption of Loy Yang Lignite and Microscopic Description of the Process | 10.3103/S0361521921030125 |
2021-05-01 | To investigate low air pressure effect on the flame radiative feedback to the fuel surface, pool fires with stable liquid surface were performed by employing three round burners with diameters of 0.15 m, 0.25 m and 0.35 m in both Lhasa (3650 m/64 kPa) and Hefei (24 m/100.8 kPa). Incident heat flux at fuel surface, flam... | Experimental study of reduced pressure effect on radiation feedback to the fuel surface of pool fires | 10.1007/s10973-020-09545-7 |
2021-05-01 | The natural science in GEO-6 makes clear that a range and variety of unwelcome outcomes for humanity, with potentially very significant impacts for human health, become increasingly likely if societies maintain their current development paths. This paper assesses what is known about the likely economic implications of ... | The costs and benefits of environmental sustainability | 10.1007/s11625-021-00910-5 |
2021-05-01 | Cobaltites with the general formula ACoO 3 exhibit a wide variety of physical properties. Cobaltite Pr 0.5 Ca 0.5 CoO 3 exhibits a metal–insulator transition accompanied by a structural shift with a delocalized intermediate spin state ( $$t_{2g}^{5} e_{g}^{1}$$ t 2 g 5 e g 1 ) or $$S^{*}$$ S ∗ at high temperature. In t... | Possible Co3+ Low Spin State in Pr0.5−xSmxCa0.5CoO3−δ Induced by Sm Doping | 10.1007/s10909-021-02587-7 |
2021-05-01 | In this paper; we propose DMDG-GDOV TFET device structure for low leakage current. Considering the potential benefits of DMDG-TFET, emphasize with Gate Drain Overlap (GDOV) has been simulated with high-k (HfO 2 ) and low-k (SiO 2 ) which results in elevated ON current (I ON ) as well as less leakage current. The gate r... | Dual-Material Gate-Drain Overlapped DG-TFET Device for Low Leakage Current Design | 10.1007/s12633-020-00547-6 |
2021-05-01 | Anthocyanin accumulation is a characteristic response to phosphate (Pi) deficiency in plants. In the present study, we investigated the role of maize anthocyanins (MA) in alleviating low Pi (LP) stress in maize ( Zea mays L). To this end, maize plants were exposed to LP conditions and treated with or without (control) ... | Transcriptomic and metabolomic profiling reveals the protective role of anthocyanins in alleviating low phosphate stress in maize | 10.1007/s12298-021-00981-9 |
2021-05-01 | Abstract It is proposed to use transistor-transistor logic (TTL) for future fast, low-power digital electronic circuits. A relaxation quantum transistor can be the basic element of these circuits. This approach allows us to circumvent the difficulties of using field effect transistors based on nanowires. | Digital Circuits Based on Quantum Transistors | 10.1134/S1063739721030033 |
2021-05-01 | Abstract The question of the application of Poisson’s law PV γ = сonst in the analysis of spatiotemporal variations in the parameters of the neutral atmosphere in this region is considered in relation to the existence of heat fluxes in the mesosphere-lower thermosphere (MLT). Poisson’s law is valid for adiabatic proces... | Polytropic Processes in the Lower Thermosphere | 10.1134/S199079312103012X |
2021-05-01 | The boundary conditions for describing the mass transfer of carbon from a low-pressure oxygen-free atmosphere into steel under vacuum carburizing are analyzed. Experimental results and thermodynamic calculations are used to determine the numerical value of the activity of carbon in an environment of low-pressure acetyl... | Problems of Simulation of Carbon Mass Transfer from Low-Pressure Saturating Atmosphere into Steel | 10.1007/s11041-021-00654-0 |
2021-05-01 | Abstract Results of laboratory and industrial investigations of the secondary steelmaking of structural steel by binary and multicomponent alloys based on silicon with alkaline earth metals (AEMs) show a decrease in the microheterogeneity of liquid metal, contamination with nonmetallic inclusions (NIs), formation of fi... | Secondary Steelmaking with Compound Alloys with AEMs—an Economically Feasible Approach to Improve Steel Quality | 10.3103/S0967091221050107 |
2021-05-01 | Photosynthetic rates vary depending on growth conditions, even within species. Remote sensing techniques have a great potential to predict the photosynthetic rates of leaves with different characteristics. Here, we demonstrate that the photosynthetic rates of leaves acclimated to different light and nutrient conditions... | Estimating leaf photosynthesis of C3 plants grown under different environments from pigment index, photochemical reflectance index, and chlorophyll fluorescence | 10.1007/s11120-021-00833-3 |
2021-05-01 | The vacuum-arc plasma-assisted method is used to deposit a multilayer coating based on Ti and Al in two discharge systems – in a traditional plasma-assisted vacuum-arc spraying system and in a gas-metal beam-plasma generation system in a hollow cathode of a non-self-sustained low pressure glow discharge. The coatings s... | Deposition of a Multilayer Coating in a Gas-Metal Beam-Plasma Formation at Low Pressure | 10.1007/s11182-021-02310-9 |
2021-05-01 | During the highway construction along the Yangtze River in Anhui, China from 2015 to 2018, regional slope failures occurred frequently near the routes and constituted significant hazards to infrastructures. Especially from June to September in 2016 and 2017, the high-temperature weather and intensive rainfall hit this ... | Research on the rainfall-induced regional slope failures along the Yangtze River of Anhui, China | 10.1007/s10346-021-01623-7 |
2021-05-01 | The atmospheric exposure test of low-hydrogen-embrittlement Cd-Ti plated (LHE Cd-Ti) 300M steel coupled with TC4 titanium alloy of different surfaces was conducted in Qingdao industrial-marine atmospheric environment. The corrosion behavior and mechanism of LHE Cd-Ti 300M steel in the galvanic couples were investigated... | Galvanic Corrosion of Low-Hydrogen-Embrittlement Cd-Ti 300M Steel Coupled with Composite-Coated TC4 Titanium Alloy in an Industrial-Marine Atmospheric Environment | 10.1007/s11665-021-05698-0 |
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